Technics SU-R1000 - Good but not the king of switching amps


Was looking at the measurements for the Technics SU-R1000 Integrated published by Stereophile. I never bother with the reviews of the sound quality as there’s 1 reviewer there whose ears I trust and it’s not this reviewer.

To be clear, this IS a digital amplifier, and is not a Class D amplifier. Atmasphere will always disagree with me, but given Technics nomenclature and the use of an A/D converter, and PWM output I think if any amplifier qualifies as digital this one does.

What I find kind of interesting here is that the measurements are OK but not absolute Class D killing results. I am particularly unimpressed by the performance of the impedance compensation circuit, LAPC, which at the end of the day does not seem to have performed significantly better than actual, non GaNFET amplifiers, particularly in removing the effects of the output filters Class D amps require. I really hoped to see a huge win here... but it’s not. It’s just making the PWM perform almost as good as a true Class D amplifier.

I have not heard this integrated, but the claims and expectations laid out for the technology seem to not be proven in the measurements. This is a very expensive integrated that does everything differently, and measures about the same as previous generation, also excellent sounding, Class D engines I’ve seen measured.

My stance that Class D was already very good and that new, faster switching amps would have to be truly spectacularly better to unseat them remains, in my mind, uncontested.

Can’t wait to see everyone trashing Class D on the measurements suddenly decide that this amp should be heard and not measured.

erik_squires

Showing 3 responses by jasonbourne52

@ricevs : On November 27 Amir tested and listened to the new Topping PA5 class D amp. It placed second to the Benchmark AHB2. Speakers used were the Infinity R253's. PA5 had 40/80 wpc for $349! Sonically second to the AHB2! All you ASR haters should pay attention!

 

So how many of you high rollers are going to pony up the $10K + (including sales tax) for the Technics, eh? I'd rather get a Topping PA5 and a pair of 90+ db speakers!

The Technics has a headphone output of 600 ohms! Somebody at Technics was asleep! This is way beyond high! Should be less than 1 ohm! Otherwise it will act as a bad tone control when used with typical headphones!